Machine for making weather-strips.



J. A. PEARLL.

MACHINE FOR MAKING WEATHER STRIPS.

APPLICATION H-LED NOV. 24. 1914.

1,150,14;5. I Pmnmuu 17,1915.

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J. A. PEARLL.

MACHINE FOR MAKING WEATHER STRIPS.

APPLICATION map Nov.24. 1914.

1,150,145. Patented Aug. 17,1915.

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MACHINE FOR MAKING WEATHER-STRIPS.

To all whom it mag concern Be it known that I, J ULIAN ALGER PEARLL,

a citizen of the United States, residing at Detroit, in the county ofWayne and State of Michigan, have invented certain new and usefulImprovements in Machines for Making Weather-Strips, of which thefollowing is a specification. a

This invention relates to a sheet metal folder particularly adapted formaking or folding weather strips.

In devices heretofore commonly employed for making weather strips, it isnecessary to mark the strip of sheet metal where it is to be foldedinsert it in the folding means and carefully perceive if the foldingmark is in proper place and fold one angle. The strlp is'then removed,again marked for the furv ther fold and placed in the bending meanstocomplete the second fold, and so on until all the'required folds o-rbends are made. Great care has to be exercised during this old bendingoperation to prevent the mechanism from over bending the strip or infailing to form right angular bends. This old method of bending resultsin handling each strip many times, it beingnecessary to proceed as abovenoted for at least, five times, the fifth or final operation being theformation of the closely folded tongue. By the use of the improvedfolder or device embodying the features of the invention, the severalfolds are all completed at one opera tion of the mechanism or withoutremovstruction, cheap in the cost of manufacture,

' and consequently can be sold to users at a small cost. V

The invention consists 1n the construction and arrangement of theseveralparts whlch Specification of Letters Patent. Patented 'Aug. 1'71915. i Application filed novmberaa, 1914. 7 Serial No. 873,758. r

' will be more fully hereinafter described and p claimed.

In the drawing :Figure l is a perspective view of a folder or bendingdevice em- ;bodying the features of the invention and showing the partsin normal position. Fig. 2

is an end elevation thereof, showing the po- 'sition of the parts intheffirst folding or bending movements of the same, the bed beingpartially in section. Fig. 3 is a view similar to Fig. 2showing theposition of the parts when completing the folds or bends. Fig. 4 is adetail perspective view of a weather strip formed by the improved folderor bending device. Fig. 5 shows a modification embodying an improvedlock releasing mechanism.

The number 5 designates a bed which may be of any s'uitable dimensionsand material and of block like or practically solid structure having avertical slot 6 extending full lengththereof and through the oppositeends and upper side. In thetop portion of the bed a recess or seat 7 isformed and has a closing slide 8 mounted therein with its upper surfaceflush with the upper surface of the bed,'the said slide being of lesswidth than the recess or seat 7. Pins 9 are mounted in the front wall ofthe recess or seat 7 and looselyeXtend into the front edge of the Islide. 8, and surrounding these pinsand'engaging the front wall of therecess and front edge of the slide are springslO which tend to force theslide rearwardly. The rear edge of the slide 8 is formed with an upwardand rearward bevel 11 for clearance purposes as will bepresentlyexplained. In theslot 6 a vertically movable bending anvil 12 is mountedand has an upper rearwardly and upwardly beveled edge 13, and betweenthe lower edgeof the anvil and lower wall of the slot 6 springs 14- andscrew bolts 15 are interposed, the springs normally forcing and holdingthe upper portion of the anvil raise above the top surface of the bedwith the rear beveled edge of the slide 8 inlco'ntac't with the frontside thereof. The screw bolts '15 are adapted to guide the anvil initsverticalmovement and are fixed to the lower portion of the anvil andslidably project through the bottom of the bed. The screw bolts 15 arealso used to adjust the position i to releasethem from engagement withthe of the anvil 12 and simultaneously modify the tension of the springs14. The anvil 12 is held elevated by thesprings 1% with com siderableresistance to depression but when the resistance of said springs 14 isovercome by pressure imposed on the anvil, the slide 8 will close overthe anvil and'the slot 6, the

beveled edges 11 and 13 co6perating to provide a ready clearance of theanvil by the slide when the anvil has been sufficiently depressed intothe slot 6. The opposite ends of the anvil 12 near the upper bevelededge 13 have outward projections or pins 16 by which said anvil isdepressed by the operation of the bending wings hereinafter de scribed.The anvil 12 is locked in its olepressed position by catch or lookingbolts anvil to restore the several parts to normal position. The anvilis locked down by the bolts 17 toobviate any tendency of' upwardmovement thereof during the bending operation and'displacement of theslide 8 while the latter is in its rear slot closing position. In rearof the slot 6 the. bed is also formed I [with a narrow retention slot 22opening through the top to receive and hold the one edge of the sheetmetal plate and to effect the formation of an edge. right angular bend.

i A preliminary bending wing 23 is mount- 7 ed on the bed and has itsrear edge alined ends of the anvil;

with the rear wall of the slot 22,. said wing being connected to the bedby a long hmge 2 1. A finishing bending wing 25 ishinged at its loweredge to an intermediate portion of the front side of the wing 23 and isof less width than the. wing 23 so as to primarily clear the projectingedge of the anvil 12, the hinge 26 of the wing 25 being so disposed asto permit the tongue bend of the weather strip to be produced betweenthe hinged edge of the'wing 25 and the lower front portion of the wing23 when the latter wing is raised to upright position, Each of the wings23, and 25 has a plurality of handles 27 for operating the same, and the'wing 25. has cams 28 fixed to opposite ends to engage the pro]ectionsor pins 16 on the Rising from the rear portion of the bed .is an upright29 and hinged to the upper end thereof is a catch arm 30 with anundercut notch 31 to fit over the upper edge of the wing 23 and holdsaid wing in fixed upright position to lock the sheet metal strip in itspreliminarily bent position while the wing 25 is operated to completethe bends and formation of the weather strip.

In the operation of the device, both wings 23 and 25 are disposed asshown by Fig. 1, and a strip of sheet metal has one side edge firstinserted in the retention slot 22, the

strip being thereby held vertically close to the edge of the wing 23.The two wings 23 and 25 are then simultaneously raised to verticalposition by elevating the wing 23, and the lower edge of the latter wingforces the sheet metal strip over into horizontal position close theupper surface of the bed andsimultaneonsly the strip is also bentvertically against the rear side of the anvil 12, as shown by Fig. 2,thereby shaping the parts 32, 33 and 3 1 as shown by Fig. 4. The wing 23is then looked against movement by engaging the notch 31 of the arm 30with the upper edge thereof as shown by Figs. 2 and 3. The anvil 12still remains elevated, but as soon as the wing 23 is locked againstmovement, the wing 25 is turned down and the strip is bent over thebeveled edge 13 of the anvil, and the cams 28 engage the projections orpins 16, and, as the said wing is continued in its movement toward ahorizontal plane the anvil is gradually depressed until the edge 13thereof clears the rear beveled edge 11 of the slide 8 and the anvilbecomes locked by the bolts 17, when the said slide is forced rearwardlyto close over the anvil 12 and slot 6 to form a flat surface againstwhichthe part 35 of the strip is formed and at the sametime theremaining part 36 of the tongue37 of the strip is produced, the twoparts34; and

35 of the said tongue being pinched between the lower front portion ofthe wing 23 and the lower hinged edge of the wing ,25. The wing 25 isthen thrown up against the wing 23, and

the latter is released and both wings are ,unitedly thrown back on thebed as shown by Fig. 1. The slide 8 instantly resumes its normalposition, the bent strip is removed, and the bolts 17 are drawnoutwardly to releasethe anvil 12 which moves upwardly, andall the partswill then be in a position for a repetition of the same operation whenanother sheet metal strip is placed in vertical position inthe slot 22.

In Fig. 5 is shown a construction whereby the locking bolts 17 aresimultaneously operated for releasing the vertically movable anvil 12.In said figure, the locking bolts 17 are secured by means of nuts 42 toa laterally movable longitudinallyextending bar 41, which in turn isconnected to the upper ends of vertically disposed members 41-0 pivotedat 43 to the angle pieces 44 fastened to the bed 5. Extending beneathand trans versely to thebed 5 are bars 39 pivoted at 23 and 25 isprovided with bails 27 and 27 respectively, which are adapted to engagewith the portion 49 of the lever-.38. It will thus be seen that when thebail 27 is thrown back upon the bed it is constrained over the deflectedextremity of the lever 38, pushing the same forward and exerting apulling force upon bars 39 and looking the members 40, thus operating torelease the locking pins 17 from their sockets and allow theanvil toresume its normal position. This mechanism greatly minimizesmanipulation and consequently facilitates the operation of the machine.

It will be seen that a weather strip may be expeditiously, effectivelyand cheaply.

produced by means of the improved device by a simple manipulation of theparts which partially act in an automatic manner without marking theblank strip of sheet metal or removing the latter from the device toaccomplish the purpose desired.

'The improved device is within the purchasing scope 01 any one whetherfor manufacturing or domestic uses, and it is proposed to modify itsproportions and dimensions as desired and to use material in itsconstruction best adapted to render the same strong and durable.

I What is claimed is 1. In a bending device of the class specified, abed having a vertical retention'slot, an anvil depressibly mounted inand normally projecting above the bed and always maintained in uprightposition, and a pair of unitedly movable bending wings mounted on thebed, one wing being movable over the anvil independently of the otherand operating to gradually depress the anvil.

2. In a bending device of the class specified, a bed having means forholding a sheet metal strip in bending position, an anvil dc pressiblymounted in the bed, and always maintained in upright position, and apair of bending wings to cooperate with said means and the anvil, theone wing gradually depressing the anvil during the bending operationthereof.

8. In a bending device of the class speoified, a bed having means forholding a sheet metal strip in bending position, an anvil depressiblymounted in the bed, and always maintained in upri ht position, and apair of bending wings to cooperate with said means and the anvil, theanvil beingdepressed by the movement of the wings and having one sideheld parallel with the adjacent side of one of the wings during aportion of the bending operation.

4. In a bending device of the class specified, a bed having means forholding a sheet metal strip in bending position, a depressible anvilmounted in the bed, a slide automatically operating to close over theanvll whenthe latter is depressed,,and a pair'of bending wings movablymounted on the bed, one of the wings being movable over the anvil ontothe slide.

5. In a bending device of the class speci: fied, a bed having means forholding a sheet metal strip in bending position, an upright depressibleanvil mounted in the bed, means for automatically locking the anvildepressed, a slide automatically movable in the bed to close over theanvil, and a pair of bending wings movably mounted on the bed, one ofthe wings being movable over the anvil onto the slide.

6. In a bending device of the class specified, a bed having means forholding a sheet metal strip in bending position, a pair of bending wingsmovably mounted on the bed, an upright depressible anvil mounted in thebed, an automatically operating slide movable over the anvil, and meansin part carried by the anvil and in part by one of the wings fordepressing the anvil at a proper interval.

7. In a bending device ofthe class specified, a bed having means forholding a sheet metal strip in bending position, an upright depressibleanvil mounted in the bed, a pair of bending wings movably mounted on thebed, one of the wings being movable over the anvil, and means carried bythe anvil and one of the wings for automatically depressing the anvil.

8. In arbending device of the class specified, a bed having means forholding a sheet metal strip in bending position, a bending anvildepressibly mounted in the bed, bend-- mg wings mounted on the bed,theone wing being movable over the anvil independently of the other, andmeans for locking one of the wings in upright position while theremaining wing is moved over the anvil.

9. In a bending device of the class specified, a bed having a verticalslot for holding a sheet metal strip in upright position, a pair ofbending wings movably mounted on the bed, the one wing having its loweredge normally coincident'with the rear wall of the said slot, one wingalso being of less width than the other andhinged to the? latter, adepressible anvil mounted in the bed, the narrower wing being movableover the anvil, and a slide mounted in the bed to close over the anvil.

10. In a bending device of the class specified, a bed having means forholdinga sheet metal strip in bending position, a de'pressi ble anvil, apair of bending wings movably mounted on the bed, the one wing beinghinged to the other and movable over the anvil, and a slide mounted onthe bed to In testimony whereof I alfix my signature automatically closeover the anvil, the up in presence-of two Witnesses. per edge of theanvil and the rear edge of the slide being beveled at similar angles toJULIAN ALGER B provide for a close bend on the anvil and a Witnesses:

ready clearance of the upper edge of the an- LoUIs A. KOENIG,

vil by the slide. FRANK E. BURCH.

Copies of this patent may he obtained for five cents each, by addressingthe Commissioner of Patents,

- Washington, I). G.

